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-rw-r--r--plug-ins/common/smooth-palette.c499
1 files changed, 499 insertions, 0 deletions
diff --git a/plug-ins/common/smooth-palette.c b/plug-ins/common/smooth-palette.c
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+++ b/plug-ins/common/smooth-palette.c
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+/*
+ * smooth palette - derive smooth palette from image
+ * Copyright (C) 1997 Scott Draves <spot@cs.cmu.edu>
+ *
+ * GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+
+#define PLUG_IN_PROC "plug-in-smooth-palette"
+#define PLUG_IN_BINARY "smooth-palette"
+#define PLUG_IN_ROLE "gimp-smooth-palette"
+
+
+/* Declare local functions. */
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+
+static gboolean dialog (gint32 drawable_id);
+
+static gint32 smooth_palette (gint32 drawable_id,
+ gint32 *layer_id);
+
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+ NULL, /* init_proc */
+ NULL, /* quit_proc */
+ query, /* query_proc */
+ run, /* run_proc */
+};
+
+
+MAIN ()
+
+static void
+query (void)
+{
+ static const GimpParamDef args[] =
+ {
+ { GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
+ { GIMP_PDB_IMAGE, "image", "Input image (unused)" },
+ { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
+ { GIMP_PDB_INT32, "width", "Width" },
+ { GIMP_PDB_INT32, "height", "Height" },
+ { GIMP_PDB_INT32, "ntries", "Search Depth" },
+ { GIMP_PDB_INT32, "show-image", "Show Image?" }
+ };
+
+ static const GimpParamDef return_vals[] =
+ {
+ { GIMP_PDB_IMAGE, "new-image", "Output image" },
+ { GIMP_PDB_LAYER, "new-layer", "Output layer" }
+ };
+
+ gimp_install_procedure (PLUG_IN_PROC,
+ N_("Derive a smooth color palette from the image"),
+ "help!",
+ "Scott Draves",
+ "Scott Draves",
+ "1997",
+ N_("Smoo_th Palette..."),
+ "RGB*",
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (args), G_N_ELEMENTS (return_vals),
+ args, return_vals);
+
+ gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Colors/Info");
+}
+
+static struct
+{
+ gint width;
+ gint height;
+ gint ntries;
+ gint try_size;
+ gint show_image;
+} config =
+{
+ 256,
+ 64,
+ 50,
+ 10000,
+ 1
+};
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[3];
+ GimpRunMode run_mode;
+ gint32 drawable_id;
+ GimpPDBStatusType status = GIMP_PDB_SUCCESS;
+
+ run_mode = param[0].data.d_int32;
+
+ INIT_I18N ();
+
+ *nreturn_vals = 3;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = status;
+ values[1].type = GIMP_PDB_IMAGE;
+ values[2].type = GIMP_PDB_LAYER;
+
+ drawable_id = param[2].data.d_drawable;
+
+ switch (run_mode)
+ {
+ case GIMP_RUN_INTERACTIVE:
+ gimp_get_data (PLUG_IN_PROC, &config);
+ if (! dialog (drawable_id))
+ return;
+ break;
+
+ case GIMP_RUN_NONINTERACTIVE:
+ if (nparams != 7)
+ {
+ status = GIMP_PDB_CALLING_ERROR;
+ }
+ else
+ {
+ config.width = param[3].data.d_int32;
+ config.height = param[4].data.d_int32;
+ config.ntries = param[5].data.d_int32;
+ config.show_image = param[6].data.d_int32 ? TRUE : FALSE;
+ }
+
+ if (status == GIMP_PDB_SUCCESS &&
+ ((config.width <= 0) || (config.height <= 0) || config.ntries <= 0))
+ status = GIMP_PDB_CALLING_ERROR;
+
+ break;
+
+ case GIMP_RUN_WITH_LAST_VALS:
+ /* Possibly retrieve data */
+ gimp_get_data (PLUG_IN_PROC, &config);
+ break;
+
+ default:
+ break;
+ }
+
+ if (status == GIMP_PDB_SUCCESS)
+ {
+ if (gimp_drawable_is_rgb (drawable_id))
+ {
+ gimp_progress_init (_("Deriving smooth palette"));
+
+ gegl_init (NULL, NULL);
+ values[1].data.d_image = smooth_palette (drawable_id,
+ &values[2].data.d_layer);
+ gegl_exit ();
+
+ if (run_mode == GIMP_RUN_INTERACTIVE)
+ gimp_set_data (PLUG_IN_PROC, &config, sizeof (config));
+
+ if (config.show_image)
+ gimp_display_new (values[1].data.d_image);
+ }
+ else
+ {
+ status = GIMP_PDB_EXECUTION_ERROR;
+ }
+ }
+
+ values[0].data.d_status = status;
+}
+
+static gfloat
+pix_diff (gfloat *pal,
+ guint bpp,
+ gint i,
+ gint j)
+{
+ gfloat r = 0.f;
+ guint k;
+
+ for (k = 0; k < bpp; k++)
+ {
+ gfloat p1 = pal[j * bpp + k];
+ gfloat p2 = pal[i * bpp + k];
+ r += (p1 - p2) * (p1 - p2);
+ }
+
+ return r;
+}
+
+static void
+pix_swap (gfloat *pal,
+ guint bpp,
+ gint i,
+ gint j)
+{
+ guint k;
+
+ for (k = 0; k < bpp; k++)
+ {
+ gfloat t = pal[j * bpp + k];
+ pal[j * bpp + k] = pal[i * bpp + k];
+ pal[i * bpp + k] = t;
+ }
+}
+
+static gint32
+smooth_palette (gint32 drawable_id,
+ gint32 *layer_id)
+{
+ gint32 new_image_id;
+ gint psize, i, j;
+ guint bpp;
+ gint sel_x1, sel_y1;
+ gint width, height;
+ GeglBuffer *buffer;
+ GeglSampler *sampler;
+ gfloat *pal;
+ GRand *gr;
+
+ const Babl *format = babl_format ("RGB float");
+
+ new_image_id = gimp_image_new_with_precision (config.width,
+ config.height,
+ GIMP_RGB,
+ GIMP_PRECISION_FLOAT_LINEAR);
+
+ gimp_image_undo_disable (new_image_id);
+
+ *layer_id = gimp_layer_new (new_image_id, _("Background"),
+ config.width, config.height,
+ gimp_drawable_type (drawable_id),
+ 100,
+ gimp_image_get_default_new_layer_mode (new_image_id));
+
+ gimp_image_insert_layer (new_image_id, *layer_id, -1, 0);
+
+ if (! gimp_drawable_mask_intersect (drawable_id,
+ &sel_x1, &sel_y1, &width, &height))
+ return new_image_id;
+
+ gr = g_rand_new ();
+
+ psize = config.width;
+
+ buffer = gimp_drawable_get_buffer (drawable_id);
+
+ sampler = gegl_buffer_sampler_new (buffer, format, GEGL_SAMPLER_NEAREST);
+
+ bpp = babl_format_get_n_components (gegl_buffer_get_format (buffer));
+
+ pal = g_new (gfloat, psize * bpp);
+
+ /* get initial palette */
+
+ for (i = 0; i < psize; i++)
+ {
+ gint x = sel_x1 + g_rand_int_range (gr, 0, width);
+ gint y = sel_y1 + g_rand_int_range (gr, 0, height);
+
+ gegl_sampler_get (sampler,
+ (gdouble) x, (gdouble) y, NULL, pal + i * bpp,
+ GEGL_ABYSS_NONE);
+ }
+
+ g_object_unref (sampler);
+ g_object_unref (buffer);
+
+ /* reorder */
+ if (1)
+ {
+ gfloat *pal_best;
+ gfloat *original;
+ gdouble len_best = 0;
+ gint try;
+
+ pal_best = g_memdup (pal, bpp * psize);
+ original = g_memdup (pal, bpp * psize);
+
+ for (try = 0; try < config.ntries; try++)
+ {
+ gdouble len;
+
+ if (!(try%5))
+ gimp_progress_update (try / (double) config.ntries);
+ memcpy (pal, original, bpp * psize);
+
+ /* scramble */
+ for (i = 1; i < psize; i++)
+ pix_swap (pal, bpp, i, g_rand_int_range (gr, 0, psize));
+
+ /* measure */
+ len = 0.0;
+ for (i = 1; i < psize; i++)
+ len += pix_diff (pal, bpp, i, i-1);
+
+ /* improve */
+ for (i = 0; i < config.try_size; i++)
+ {
+ gint i0 = 1 + g_rand_int_range (gr, 0, psize-2);
+ gint i1 = 1 + g_rand_int_range (gr, 0, psize-2);
+ gfloat as_is, swapd;
+
+ if (1 == (i0 - i1))
+ {
+ as_is = (pix_diff (pal, bpp, i1 - 1, i1) +
+ pix_diff (pal, bpp, i0, i0 + 1));
+ swapd = (pix_diff (pal, bpp, i1 - 1, i0) +
+ pix_diff (pal, bpp, i1, i0 + 1));
+ }
+ else if (1 == (i1 - i0))
+ {
+ as_is = (pix_diff (pal, bpp, i0 - 1, i0) +
+ pix_diff (pal, bpp, i1, i1 + 1));
+ swapd = (pix_diff (pal, bpp, i0 - 1, i1) +
+ pix_diff (pal, bpp, i0, i1 + 1));
+ }
+ else
+ {
+ as_is = (pix_diff (pal, bpp, i0, i0 + 1) +
+ pix_diff (pal, bpp, i0, i0 - 1) +
+ pix_diff (pal, bpp, i1, i1 + 1) +
+ pix_diff (pal, bpp, i1, i1 - 1));
+ swapd = (pix_diff (pal, bpp, i1, i0 + 1) +
+ pix_diff (pal, bpp, i1, i0 - 1) +
+ pix_diff (pal, bpp, i0, i1 + 1) +
+ pix_diff (pal, bpp, i0, i1 - 1));
+ }
+ if (swapd < as_is)
+ {
+ pix_swap (pal, bpp, i0, i1);
+ len += swapd - as_is;
+ }
+ }
+ /* best? */
+ if (0 == try || len < len_best)
+ {
+ memcpy (pal_best, pal, bpp * psize);
+ len_best = len;
+ }
+ }
+
+ gimp_progress_update (1.0);
+ memcpy (pal, pal_best, bpp * psize);
+ g_free (pal_best);
+ g_free (original);
+
+ /* clean */
+ for (i = 1; i < 4 * psize; i++)
+ {
+ gfloat as_is, swapd;
+ gint i0 = 1 + g_rand_int_range (gr, 0, psize - 2);
+ gint i1 = i0 + 1;
+
+ as_is = (pix_diff (pal, bpp, i0 - 1, i0) +
+ pix_diff (pal, bpp, i1, i1 + 1));
+ swapd = (pix_diff (pal, bpp, i0 - 1, i1) +
+ pix_diff (pal, bpp, i0, i1 + 1));
+
+ if (swapd < as_is)
+ {
+ pix_swap (pal, bpp, i0, i1);
+ len_best += swapd - as_is;
+ }
+ }
+ }
+
+ /* store smooth palette */
+
+ buffer = gimp_drawable_get_buffer (*layer_id);
+
+ for (j = 0; j < config.height; j++)
+ {
+ GeglRectangle row = {0, j, config.width, 1};
+ gegl_buffer_set (buffer, &row, 0, format, pal, GEGL_AUTO_ROWSTRIDE);
+ }
+
+ gegl_buffer_flush (buffer);
+
+ gimp_drawable_update (*layer_id, 0, 0,
+ config.width, config.height);
+ gimp_image_undo_enable (new_image_id);
+
+ g_object_unref (buffer);
+ g_free (pal);
+ g_rand_free (gr);
+
+ return new_image_id;
+}
+
+static gboolean
+dialog (gint32 drawable_id)
+{
+ GtkWidget *dlg;
+ GtkWidget *spinbutton;
+ GtkAdjustment *adj;
+ GtkWidget *sizeentry;
+ guint32 image_id;
+ GimpUnit unit;
+ gdouble xres, yres;
+ gboolean run;
+
+ gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+ dlg = gimp_dialog_new (_("Smooth Palette"), PLUG_IN_ROLE,
+ NULL, 0,
+ gimp_standard_help_func, PLUG_IN_PROC,
+
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_OK"), GTK_RESPONSE_OK,
+
+ NULL);
+
+ gtk_dialog_set_alternative_button_order (GTK_DIALOG (dlg),
+ GTK_RESPONSE_OK,
+ GTK_RESPONSE_CANCEL,
+ -1);
+
+ gimp_window_set_transient (GTK_WINDOW (dlg));
+
+ image_id = gimp_item_get_image (drawable_id);
+ unit = gimp_image_get_unit (image_id);
+ gimp_image_get_resolution (image_id, &xres, &yres);
+
+ sizeentry = gimp_coordinates_new (unit, "%a", TRUE, FALSE, 6,
+ GIMP_SIZE_ENTRY_UPDATE_SIZE,
+ FALSE, FALSE,
+
+ _("_Width:"),
+ config.width, xres,
+ 2, GIMP_MAX_IMAGE_SIZE,
+ 2, GIMP_MAX_IMAGE_SIZE,
+
+ _("_Height:"),
+ config.height, yres,
+ 1, GIMP_MAX_IMAGE_SIZE,
+ 1, GIMP_MAX_IMAGE_SIZE);
+ gtk_container_set_border_width (GTK_CONTAINER (sizeentry), 12);
+ gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dlg))),
+ sizeentry, FALSE, FALSE, 0);
+ gtk_widget_show (sizeentry);
+
+ adj = GTK_ADJUSTMENT (gtk_adjustment_new (config.ntries,
+ 1, 1024, 1, 10, 0));
+ spinbutton = gimp_spin_button_new (adj, 1, 0);
+ gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
+
+ gimp_table_attach_aligned (GTK_TABLE (sizeentry), 0, 2,
+ _("_Search depth:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_int_adjustment_update),
+ &config.ntries);
+
+ gtk_widget_show (dlg);
+
+ run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
+
+ if (run)
+ {
+ config.width = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (sizeentry),
+ 0);
+ config.height = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (sizeentry),
+ 1);
+ }
+
+ gtk_widget_destroy (dlg);
+
+ return run;
+}
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